Fish-screen.



E. L. DEWALD.

FISH SCREEN.-

AYPLIGATION FILED JAN.16,1914.

Patented Dec. 15, 1914.

. f /LV f dle, and as twoof these spindles are necessary for the proper mounting ofthe revolv-v ing screen 8, one of the said spindles isprovided for and disposed upon each end of the screen, the said spindles being journaled within the respective castings '6. To each spindle is secured a Specially formedcasting 19, between extensions of Awhich trans;A

Upon referenceito the drawingsritwill` vbe noted that the blades 20 extend from cfthegstream, ,said auxil'ary'bladesy come 1n oontactfwlth one to the other of the castings 19, while the auxiliary blades 23` are disposed in spaced relatio-n, a series of blades being provided for each blade 20, the` space between the said auxiliary blade providing for the passage of leaves, twigs and other debris from kone to the other side of the screen.

Brackets 24 are secured to the several blades 20 as a support for rods 25 arranged -in parallel relation, the said rods serving as a retaining element for the auxiliary blade 23, the latter being pivoted vas at `22 thereto. It is to be understood that thev size of .the screen may be varied to correspond'with the sizer and depth of the stream within which it is arranged. `When it is'desired that the entire screen be raised or lowered, such movement may be effected by manipulation of the crank shaft 14. The rotation of the said shaft 14 will correspondingly rotate the drum 13 and windV the fiexibleelements 10, 9 and 11' thereupon, and as the said elements arev connected to the castings 6, it is lapparent that the entire screen may be bodilyraisedor lowered tofposition the longitudinal axis of thewheelv 21 uponthe same plane as the surface of the screen, as the said wheel, when thus positioned `is best adapted to the use` for which itis designed. 'It is to be understood that the device acts onlyA as a fish scare, the report caused by the falling blades contacting the surface of the water being Asuch in its nature as to prevent A.the approachv of fish. Even when elevated,

inthe event of a rise in the water, the noise created by rotation ofthe wheel is such as to prevent fish from approaching the device, thereby precluding passage of the fish beneath the saidvdevice when thus raised.

From the above, taken in connection with the accompanyingdrawings, it will be noted that by pi-votally connecting the-several aux- 'iliaryblades to thehblades 20 ofthe water wheel, the former duringthey rotation ofthe latter, will fall by gravity upon the surface and as` vthe broadside of the that the form of my invention, illustratedl inthe drawings and referred to in the above description, as the preferred embodiment, is the most efficient and practical; yet realizing v that the conditions concurrent with the adoption of my device willnecessarily vary, desire to emphasize the fact'thatvarious minor changes in details vof construction, proportion andarrangement of parts maybe resorted to, when required, without sacrificing any of the` advantages ofV my -i'nvention,*`

as defined in the appended claims.

Havingl thus fully describedA my inven-` tion, what 1 claim as new and desiretose- Cure by Letters Patent, is l y 1. A iishfscreen including a v.rotatable u water wheel, 'means operable to maintain `the axis of rotation of said wheel upon substantially the sameplane as the surface of the water within .whichit is arranged, land a pluralityl of auxiliary blades hingedly connected to the said wheel, the bladesbeing adapted to fall by gravity during rotation of the wheelupon the surface of the water, as and for thevp'urpose set forth. a

2. A vfish screen includingy a rotatable water wheel, a frametherefor, means operable; upon the framev to bodily raise and lower said wheel, said-wheely being rotated by the flow ofthepassing stream, and means including', a vplurality of auxiliary blades pivoted to said water wheel, said blades adapted to contact the water :during the vrotation ofthesaid wheel, as and for thepurpose set forth.

3. A fish screen rotatable by operation byv theflow of a passing stream, a framefor said screen, means operable upon said frame whereby saidscreen may be bodily raised or lowered to vary the position ofthe screen accordingfto the rise yand fall 'of waterif'l within the stream, andr means including; a plurality ofauxiliary bladespivoted to each wheel blade, said auxiliaryblades adapted to forcibly contact thesurface-of the stream forcibly the surface of during rotation of vsaid waterwheehas and for the purpose set forth.

4. A fish screen including a supporting frame, the upright portions; of thel said frame having grooves extendinglongitudinally tween thev said uprights yof said support, said screen member being rotatablebythe flow of a passing stream, ',said'screenmember comprising a Awaterwheel, spindles disposed upon the extremities thereof, castings slidable verticallyfthroughout Athe length, of

thereof, ay screen mmber operable be nals for said spindles, means operable upon during the rotation of said screen member, said frame for raising and lowering said as and for the purpose set forth. 1o screen bodily to position the longitudinal In testimony whereof I affix my signature axis of the screen upon the same plane as in presence of two witnesses.

the surface of the water, and means inolud- EDGAR L. DEWALD. ing a plurality of auxiliary blades pivoted Witnesses: to each wheel blade, said blades adapted to W. R. ALLIsoN, forcibly contact the surface of the stream CARL J. AsHE.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner oi '.Patents,

Washington, D. C. 

